In 1982 the Lawn Lake Dam in Rocky Mountain National Park burst producing extreme floodwaters with water-walls that were estimated to be over 25 ft. tall, moving boulders weighing over 400 tons. Several activities will be presented at a level appropriate for AP or introductory university physics courses that will enable students to estimate the water flow needed to move such enormous rocks. The activities presented have a natural appeal and have applications to environmental science, civil and environmental engineering and encourage students to become environmental detectives.